MacBook Pro blinks

Intel Core i5 2.7GHz, 13.3", Intel Iris Graphics 6100

4.15.1 has the issue, 4.14.3 doesn’t.

See from a distance is OK, close enough to a surface rise the issue (as the pictures shows).

Blink occurs during camera moving, if camera stops moving, the crashed image just keep what it looks like.

I really don’t want to go back to 4.14.3 because I find that 4.15.1 is much faster to launch the editor. If this is a bug, is there any walk around before the next release?

I find a walk around myself: Settings->Scalability->Preview Rendering Level, change from the previous “Shader Model 4” to “High End Mobile / Meta → iOS Metal Preview” will make the display OK. (The first time takes really really long time, maybe up to 10 minutes, as if the editor is frozen.)

The problem is the option cannot be saved. Every time I open the editor, I need to reset it, though latter change of the option takes only a few seconds.